package com.wanmait.gohome.filter;


import com.wanmait.gohome.util.SysContext;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;
@WebFilter("/*")
public class InitFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        int pageNum;
        try {
            pageNum = Integer.parseInt(servletRequest.getParameter("pageNum"));
        } catch (NumberFormatException e) {
            pageNum=1;
        }
        SysContext.setPageNum(pageNum);
        filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {

    }
}
